1、>>> myteacher = 'big'

yourteacher = myteacher
myteacher = 'small'
print（yourteacher）
→big
错误答案：myteacher

2、>>> first = 100

second = '100'
first = second
print (first)
→100
错误答案：‘100’

3、除了\进行转义，还有什么方法

str = "Let's go!"
print(str)
→Let’s go!
双引号和三引号（"""..."""）中可以包含单引号，三引号('''...''')可以包含双引号，而不需要转义